Rock dust blower



FIG. 1 is a front elevational view of a rock dust blower showing our new design

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines in the figures are included for the purpose of illustrating portions of the rock dust blower and form no part of the claimed design. 

CLAIM The ornamental design for a rock dust blower, as shown and described. 